It is a good idea to check receiver voltage after charging and before flying for the first time each day, then again after a few flights.

The VoltWatch although being a good idea and relatively inexpensive does have a downside you need to be aware of.

Firstly it takes up one channel on your receiver. Probably not a big deal in your first few planes, but it could be a problem for later planes where you need every channel you can get.

Also you need to buy one for each plane you have. At $11 it sounds inexpensive, but add this up over a few planes and it starts to become an issue.

I personally use a Hobbico Digital Voltmeter MkII that I can plug into the charge socket on any of my planes and get a read-out of the receiver voltage under load. The voltmeter has a switch to load up the battery to simulate servo use.

I can use my voltmeter on any plane and it is only a one-off cost.

I also use Ernst charge receptacles on all of my planes so that the charge jack is nicely mounted on the side of the fuselage and then checking the voltage or charging the plane is very simple and the wing does not need to be removed.

The Ernst charge receptacle is only about $2.50 and looks like this:



I highly recommend them.

Hope this helps!